Lower set insert with a lower ball seat for a downhole plug



FIG. 1 is a perspective view of a lower set insert with lower ball seat for a downhole plug showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front side plan view thereof, wherein the front side plan view and the back side plan views are identical;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a left side plan view thereof, wherein the left side plan view and the right side plan views are identical. 

CLAIM The ornamental design for a lower set insert with lower ball seat for a downhole plug, as shown and described. 